AP Twitter Account Hacked, Tweet About Obama Shakes Market00:38

A Twitter account from The Associated Press was hacked Tuesday afternoon and the erroneous message — to be perfectly clear, it WAS NOT TRUE — sent stocks down sharply for a few moments.

The false message claimed there had been two explosions at the White House and that President Obama had been injured. Again, none of that happened.

Just after 1 p.m. ET, the Dow Jones industrial average dropped about 130 points, around 1 percen. It quickly bounced back as the truth — that there had been no such explosions and that the president was fine — became apparent.

By 1:45 p.m. the Dow was firmly back in positive territory, more than 120 points (about 1 percent) up from Monday's close.